Subtract 30/42 from 9/18
9/18 - 30/42 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
9/18 = 9 × 7/18 × 7 = 63/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
30/42 = 30 × 3/42 × 3 = 90/126 - Subtract the two like fractions:
63/126 - 90/126 = 63 - 90/126 = -27/126 - After reducing the fraction, the answer is -3/14
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